関連する実験動画
Updated: Mar 15, 2026

07:13
3D Modeling of Dendritic Spines with Synaptic Plasticity
Published on: May 18, 2020
7.5K
シナプス後密度の相変化がシナプス複合体の形成とシナプス可塑性の基礎となる
Menglong Zeng1, Yuan Shang1, Yoichi Araki2
1Division of Life Science, State Key Laboratory of Molecular Neuroscience, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Cell
|August 28, 2016
まとめ
SynGAPタンパク質はトリマーを形成し,PSD-95に結合し,ポストシナプス密度 (PSD) を模倣する液体のような滴を誘導する. この発見はシナプスの可塑性にとって重要な ダイナミックなアンカリングメカニズムを明らかにしています
科学分野:
- 神経科学
- 分子生物学
- 細胞生物学
背景:
- ポストシナプス密度 (PSD) は,シナプス可塑性を調節する重要なタンパク質に富んだコンパートメントです.
- PSDの形成と動態を理解することは神経科学の鍵です.
- SynGAPは,シナプス機能の調節に関与するPSD内の重要な豊富なタンパク質です.
研究 の 目的:
- SynGAPがポストシナプス密度で固定される分子のメカニズムを調査する.
- PSD形成とダイナミクスのSynGAP-PSD-95相互作用の役割を明らかにする.
- PSDの構造と機能に対する相分離の貢献を調査する.
主な方法:
- SynGAPのオリゴメリゼーション状態を決定する生化学的測定
- SynGAP- PSD-95の結合を研究するための共免疫降水.
- ドロップレット形成を観察するためのインビトロ相分離測定法.
- PSDに関連したSynGAPダイナミクスを視覚化するためのコンフォカル顕微鏡.
主要な成果:
- SynGAPはホモトリマーを形成し,多価PSD-95タンパク質に結合する.
- SynGAP-PSD-95複合体は液体-液体相分離を経て,PSDに似た滴を形成する.
- この多値相互作用は,PSDからのSynGAPアンカー化と活動依存分散に不可欠です.
結論:
- 多変量相互作用と相分離を介してPSDにSynGAPのダイナミックアンカリングのための新しいメカニズムが提案されています.
- 段階分離は,ポストシナプス密度の形成の重要なメカニズムとして提案されています.
- この研究は,シナプス可塑性とPSD組織の分子基礎についての洞察を提供します.
関連する概念動画
Long-term Potentiation
3.8K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when...
Hebbian LTP
LTP can occur when...
3.8K
Long-term Potentiation
59.2K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
59.2K
Chemical Synapses
7.0K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
7.0K
Chemical Synapses
12.3K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
12.3K
Long-term Depression
33.6K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
33.6K
Long-term Depression
3.5K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over...
Calcium Ion Concentration Mechanism
If over...
3.5K

